Piston-rod packing.



c. l. E. MASTIN. 4 PISTON ROD PACKING.

APPLICATION FILED JUNE 6. 1913- RENEWED MAR. H 1914.

Patented Aug. 17, 1915.

cowmm monum co" WASHINGTON. n; c.

CHARLES I. E. MAS TI1\T-,10F MInLANnrARK, new JERSEY.

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I Application-filed. June 6,1913, seriaino; 772,043. Renewed March 4,1914. Serial me es.

To all whom it mag concern I CHARLES I. E. MASTIN, a citizen of theUnited States, and resident of Midland Park county. of Bergen, and StateofNew Jersey, have invented certain new and useful Improvements inPiston- Bod Packings, of which the following isa specification. Thisinvention relates to packing for piston rods and'other moving-parts ofengines and machinery where a tight joint is required to preventthepassage'ofsteam, air, oil'or water, or other fluid. A v l One of theobjects" of this invention'isto provide a packing strip'o'f' simpleconstruction'which' will be very di'irable and very flexible. .Anotherobject of the invention is to provide a packing strip made' upof'alternate layers offabric and" rubber so disposedthat the edges ofthe layers of duck and-rubber will be exposed on the'wearing surfaces ofthe'packing strip.

Another object of theinvention is to pro- Be it known thatI,

vlde a one-piece packing strip madeup 'of' four sections ofsemi-cylindrical formper manently united with their straightflatfsurfaces outermost, the space between the convexportions of saidelements or se'ctionsbeing filled by a suitable elastic core.

Referring. to the drawings, Figure 1 isa sectional perspective viewshowing the parts of my improved packing strip assembled but unconnectedto each other Fig. 2 a similar view showing the parts united and thepacking strip complete; andFig. 3 a similar viewof a roll" of fabric andrubber layersbefore it is'divided' longitudinally to fornisemicylindrical'members of the packing strip.

' In making up my improved packing strip I first roll fabric, preferablyduck, and rubber layers'into a roll 1 ofthe proper dimensicns, as shownin Fig. 3; The diameter of the rollwill, of course, govern the size ofthe completed packing stripg This roll or these sections are' thenarranged with their flat straight sides outermost, their convex sidesbeing directed toward each other, This arrangement of the four sectionsis tube I'pla'ce 'a mandrel't When the parts are thus assembled andbrought together able pressure is brought thereon 51 inder is then splitlongitudinally to form two'semi-cylindrical sections 2. Four of theyareplacedin' asuitable press and suitto compress the sameandjforce thetube 8 to fillthe space between the "four convexsurfaces of the strips.This is shown very clearly in Fig. 2' of the drawing; VVhile'the partsare in thiscompressed condition theyare subjected to 'afsuitable heatwhich unites all' of the sections permanently forming a sealed onepiecepacking strip. The mandrel is-maintainedkin position in order tudinal:aperture through the packing strip, this aperture giving the stripgreatjfiexi bility;

It is to be noted that the layers ofduck and rubber are curved and thatthe edges are exposed on the square faces of the packing strip. "It'isalso tobe observed that the layers ofduck and rubber of each section 2.areexposed'on one side of the packing strip and that they do notrunthrough from one side to another. It is also to be observedthat thereare noangular strips or layers in the packing and that all of saidlayers maintain their original parallel, curved'relation to eachother.By bringing allof the edges of the duck and rubber layers-to thewearingsurfaces of the packing stripv these edges are properly'presented to thewearing parts, thereby insuring great durability with the least amountoffriction onthe parts. i By arranging the convex sides of the originalsections-inwardly and filling the space between themwith an elastic corethe completed packing strip will be very elastic and flexible and may bereadily'coiled or made into rings, as may bedesired.

VVhatI claim is: I V

1.'A packing strip formed of a pluralityv of semi-cylindrical sectionspermanently united with their curvedforconvex surfaces inwardly towardeach other.

2." A packingstrip comprising a plurality of semi-cylindrical sectionspermanently united with their convex surfaces inwardly toward each-other, each semi-cylindrical section being formed of alternate layersof rubber andfabric.

3. A packing strip comprising a plurality of semi-cylindrical sectionspermanently unitedwith'th'eir convex surfaces inwardly towardeachother,each semi-cylindrical section being formed of alternate layers'of'rubi core filling the space between said sections and penna:v

' nently'unit'edthereto.

her and fabric, and an elastic 4; A packing strip comprising a pluralityto form a longi Specification of L etters lfatenta Patented Aug, 17,1915,

of semi-cylindrical sections permanently united with their convexsurfaces inwardly toward each other, each semi-cylindrical sec tionbeing formed of alternate layers of rubber and fabric, and an elastichollow core] filling the space between said sections and permanentlyunited thereto.

. 5.. A packing strip comprising a plurality;

of -;semi-cylindrical sections permanently united with their convexsurfaces inwardly toward each other, each semi-cylindrical section beingformed ofalternate layers of fabric and rubber, said layers beingparallel with the convex surfaces of the sections, whereby the edges ofsaid layers will beexposed along the outer surfaces of thepacking strip.e

6. -A packing strip comprising a plurality of semi-cylindrical 7sections permanently united with their convex surfaces inwardly towardeach other, each semi-cylindrical secwith the convex surfaces of thesections,

whereby the edges of said layers will be exposed along the outersurfaces of the packing strip, and an elastic hollow core filling thespace between said sections and permanently united thereto.

8. A packing strip comprising four semi; cylindrical sectionspermanently united with their convex surfaces inwardly and theirstraight flat surfaces forming the outer surfaces of the packing strip,each of said sections being formed of alternate layers of fabric andrubber, said layers being-parallel to the convex surfaces of thesectionsand the edges of said layers being exposed on' the flat outer surfacesofthe packing strip.

9. A packing strip comprising four semicylindrical sections permanentlyunited with their convex surfaces inwardly and their straight flatsurfaces forming the outer surfaces of the packing strip, each of saidsec tions being formed of alternate layers of fabric and rubber, saidlayers being parallel to the convex surfaces of the sections and theedges'of said layers being exposed on the flat outersurfaces ofthepacking strip,

the space between said sections being filled Clinics of this patent maybe obtained for with an elastic core permanently united therewith.

10. A packing strip comprising four semicylindrical sections permanentlyunited with their convex surfaces inwardly and their straightnflatsurfaces forming the outer surfaces of .the packing strip, each of saidsections being formed of alternate layers of fabric and rubber, saidlayers being parallel to the convex surfaces of the sections and the,edges of said layers being exposed on the flat outer surfaces of thepacking strip, the space between said sections being filled with anelastic hollow core permanently united therewith. V

11. A packing'coinposed of a plurality of sections or strips each ofwhich is formed with a straight side and a curved side said strips beingassembled around a cushion core or center and united, the curved sidesof the strips being within the packing and the straight sides thereofforming the exterior walls of the packing.

12. Apacking composed of a plurality of strips assembled around a corethe inner surfaces of'said strips being curved and the outer sidesthereof being straight flat surfaces and forming the exterior walls ofthe packing, and a cushion core filling the center space'formed by saidassembled sections. 13. A packing composed of a plurality of stripsassembled around a core the inner surfaces of said strips being curvedand'the outer sides thereof being straight flat surfaces and formingtheexterior walls of the packing, and a hollow cushion core filling thecenter space formed by said assembled sections.

1AA one-piece packing strip composed of a-plurality of sections orstrips each of which is formed with a straight'side and a curved side,said strips being assembled and permanently united by heat and pressureto form the sections into a homogeneous mass, the curved sides of thestrips being within the packing and the straight sides thereof formingthe exterior walls of the packing.

15. A one-piece packing composed of a plurality of strips assembledaround a core, the inner surfaces of said strips being curved and theouter sidesthereof being straight flatsurfaces and forming the exteriorwalls of the packing, the strips being permanently joined together atthe corners of the packing strip under heatand pressure to form ahomogeneous mass.

-In testimony whereof I hereunto afiix my signature in the presence oftwo witnesses. CHARLES I. E. MASTIN. Witnesses:

LILLIAN MCGUIRE,

R. MILLER.

ve cents each, by addressing the Commissioner of Patents,

Y e' a m s71,

